Final answer:
The possible gametes the father can pass down are B and l. All of their offspring will potentially be black spotted with a long tongue.
Step-by-step explanation:
a. The possible gametes the father can pass down are B and l.
b. If the female cow is BbLL and the bull is BBll, then all of their offspring will potentially be black spotted with a long tongue because the dominant traits (black spots and long tongue) are present in both parents.
Learn more about Inheritance traits